The $1 billion photo-sharing app Instagram — once named “app of the year” by Apple — has now “jumped the shark,” according to Apple’s marketing chief Phil Schiller. And not only is Schiller trashing the service (in a brief message to Apple enthusiast Clayton Braasch), he has also deleted his Instagram account (@schiller) entirely (much like some thousands of other users.) What got Schiller so upset? Not the billion-dollar acquisition by Facebook, apparently.